GRUB with IDE and SCSI disk

[Paul Howarth]

Matthew Saltzman wrote:
> One of my systems has an IDE disk and a SCSI disk.  I upgraded the IDE 
> disk and I need to reinstall grub.  /boot is in /dev/sda1, but the 
> system boots off of /dev/hda.
> 
> I've tried various things to install GRUB on the new /dev/hda, but 
> everything results in a complaint during boot that
> 
> Error 21: Selected disk does not exist.
> 
> For example, in GRUB shell, I installed using:
> 
>     > root (hd1,0)
>     > setup (hd0)
> 
> The installation seems to work fine, but boot fails as above. I had this 
> working before, but for my life I can't recall how I did it differently 
> from this.
> 
> What am I missing?
>
You probably need to make the device.map file reflect the drive ordering 
that your BIOS is using.

Paul.